[gdal-dev] gdal_fillnodata.py only generating zeros

[Simon Lewis]

I'm trying to fill nodata values (32767) in some SRTM elevation data using
gdal_fillnodata.py.

But the output file has interpolated pixels all set to zero rather than an
average of the surrounding pixels.
A new output file is created, (surprisingly quickly) so I assume the script
is working OK.

Any pointers/assistance much appreciated.

Simon
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